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bencode: optimize `(*Decoder).parseStringInterface()` (#659)

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YenForYang 2021-09-28 18:30:35 -05:00 committed by GitHub
parent 86fe6cc872
commit 37455d3c6b
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 17 deletions
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33
bencode/decode.go
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@ -611,28 +611,27 @@ func (d *Decoder) parseIntInterface() (ret interface{}) {
return
}
func (d *Decoder) parseStringInterface() interface{} {
start := d.Offset - 1
func (d *Decoder) parseStringInterface() (s string) {
// read the string length first
d.readUntil(':')
length, err := strconv.ParseInt(d.buf.String(), 10, 64)
checkForIntParseError(err, start)
d.buf.Reset()
n, err := io.CopyN(&d.buf, d.r, length)
d.Offset += n
length, err := strconv.ParseInt(bytesAsString(d.buf.Bytes()), 10, 64)
if err != nil {
checkForUnexpectedEOF(err, d.Offset)
panic(&SyntaxError{
Offset: d.Offset,
What: errors.New("unexpected I/O error: " + err.Error()),
})
panic(&SyntaxError{Offset: d.Offset-1, What: err})
}
s := d.buf.String()
d.buf.Reset()
return s
n, err := d.buf.ReadFrom(io.LimitReader(d.r, length))
d.Offset += n
switch err {
case nil:
s = d.buf.String()
d.buf.Reset()
return
case io.EOF:
err = io.ErrUnexpectedEOF
default:
err = errors.New("unexpected I/O error: " + err.Error())
}
panic(&SyntaxError{Offset: d.Offset, What: err})
}
func (d *Decoder) parseDictInterface() interface{} {